﻿//获取元素指定tagName的父元素
function public_GetParentByTagName(element, tagName) {
    var parent = element.parentNode;
    var upperTagName = tagName.toUpperCase();
    //如果这个元素还不是想要的tag就继续上溯
    while (parent && (parent.tagName.toUpperCase() != upperTagName)) {
        parent = parent.parentNode ? parent.parentNode : parent.parentElement;
    }
    return parent;
}

//设置节点的父节点Cheched——该节点可访问，则他的父节点也必能访问
function setParentChecked(objNode) {
    var objParentDiv = public_GetParentByTagName(objNode, "div");
    if (objParentDiv == null || objParentDiv == "undefined") {
        return;
    }
    var objID = objParentDiv.getAttribute("ID");
    objID = objID.substring(0, objID.indexOf("Nodes"));
    objID = objID + "CheckBox";
    var objParentCheckBox = document.getElementById(objID);
    if (objParentCheckBox == null || objParentCheckBox == "undefined") {
        return;
    }
    if (objParentCheckBox.tagName != "INPUT" && objParentCheckBox.type == "checkbox")
        return;
    objParentCheckBox.checked = true;
    setParentChecked(objParentCheckBox);
}

//设置节点的子节点uncheched——该节点不可访问，则他的子节点也不能访问
function setChildUnChecked(divID) {
    var objchild = divID.children;
    var count = objchild.length;
    for (var i = 0; i < objchild.length; i++) {
        var tempObj = objchild[i];
        if (tempObj.tagName == "INPUT" && tempObj.type == "checkbox") {
            tempObj.checked = false;
        }
        setChildUnChecked(tempObj);
    }
}

//设置节点的子节点cheched——该节点可以访问，则他的子节点也都能访问
function setChildChecked(divID) {
    var objchild = divID.children;
    var count = objchild.length;
    for (var i = 0; i < objchild.length; i++) {
        var tempObj = objchild[i];
        if (tempObj.tagName == "INPUT" && tempObj.type == "checkbox") {
            tempObj.checked = true;
        }
        setChildChecked(tempObj);
    }
}

//触发事件
function CheckEvent() {

    var objNode = event.srcElement;

    if (objNode.tagName != "INPUT" || objNode.type != "checkbox")
        return;

    if (objNode.checked == true) {
//        setParentChecked(objNode);
        var objID = objNode.getAttribute("ID");
        var objID = objID.substring(0, objID.indexOf("CheckBox"));
        var objParentDiv = document.getElementById(objID + "Nodes");
        if (objParentDiv == null || objParentDiv == "undefined") {
            return;
        }
        setChildChecked(objParentDiv);
    }
    else {
        var objID = objNode.getAttribute("ID");
        var objID = objID.substring(0, objID.indexOf("CheckBox"));
        var objParentDiv = document.getElementById(objID + "Nodes");
        if (objParentDiv == null || objParentDiv == "undefined") {
            return;
        }
        setChildUnChecked(objParentDiv);
    }
}

